feround.c revision ddc0e0b53c661f6e439e3b7072b3ef353eadb4af
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis/*
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis * CDDL HEADER START
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis *
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis * The contents of this file are subject to the terms of the
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis * Common Development and Distribution License (the "License").
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis * You may not use this file except in compliance with the License.
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis *
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25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis */
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis/*
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis */
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis/*
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis * Use is subject to license terms.
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis */
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis
ddc0e0b53c661f6e439e3b7072b3ef353eadb4afRichard Lowe#pragma weak __fegetround = fegetround
ddc0e0b53c661f6e439e3b7072b3ef353eadb4afRichard Lowe#pragma weak __fesetround = fesetround
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis#pragma weak fegetround96 = __fegetround
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis#include <fenv.h>
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis#include <ucontext.h>
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis#include <thread.h>
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis#include "fex_handler.h"
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis#include "fenv_inlines.h"
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis#if defined(__i386) && !defined(__amd64)
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis#include <float.h>
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis#endif
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtisint fegetround(void)
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis{
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis unsigned long fsr;
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis __fenv_getfsr(&fsr);
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis return (int)__fenv_get_rd(fsr);
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis}
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtisint fesetround(int r)
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis{
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis unsigned long fsr;
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis if (r & ~3)
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis return -1;
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis __fenv_getfsr(&fsr);
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis __fenv_set_rd(fsr, r);
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis __fenv_setfsr(&fsr);
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis#if defined(__i386) && !defined(__amd64)
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis FLT_ROUNDS = (0x2D >> (r << 1)) & 3; /* 0->1, 1->3, 2->2, 3->0 */
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis#endif
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis return 0;
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis}
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtisint fesetround96(int r)
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis{
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis unsigned long fsr;
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis if (r & ~3)
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis return 0;
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis __fenv_getfsr(&fsr);
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis __fenv_set_rd(fsr, r);
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis __fenv_setfsr(&fsr);
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis#if defined(__i386) && !defined(__amd64)
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis FLT_ROUNDS = (0x2D >> (r << 1)) & 3; /* 0->1, 1->3, 2->2, 3->0 */
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis#endif
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis return 1;
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis}